package app.foodnote;

import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.provider.Settings;;

public class GPSTracker extends Service implements LocationListener {
	private final Context mContext;
	boolean isGPSEnabled = false;
	boolean isNetorkEnabled = false;
	boolean canGetLocation = false;
	
	Location location;
	double latitude;
	double longitude;
	
	private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10;
	private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; 
	
	protected LocationManager locationManager;
	
	public GPSTracker(Context context){
		this.mContext = context;
		getLocation();
	}

	public Location getLocation() {
		try {
			locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);
			// getting GPS status
			isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
			
			// getting network status
			isNetorkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
			
			if(!isGPSEnabled && !isNetorkEnabled) {
				//this.showSettingsAlert();
			} else {
				this.canGetLocation = true;
				// First get location from Network Provider
				if(isNetorkEnabled){
					locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
					Log.d("Network", "Network");
					if(locationManager != null){
						location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
						if(location != null){
							latitude = location.getLatitude();
							longitude = location.getLongitude();
						}
					}
				}
				// If GPS Enabled get lat/long using GPS Services
				if(isGPSEnabled){
					if(location == null){
						locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
						Log.d("GPS Enabled", "GPS Enabled");
						if(locationManager != null){
							location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
							if(location != null){
								latitude = location.getLatitude();
								longitude = location.getLongitude();
							}
						}
					}
				}
			}
		} catch (Exception e){
			e.printStackTrace();
		}
		return location;
	}
	public void onLocationChanged(Location locat) {
		
	}

	public void onProviderDisabled(String provider) {
		// TODO Auto-generated method stub
		
	}

	public void onProviderEnabled(String provider) {
		// TODO Auto-generated method stub
		
	}

	public void onStatusChanged(String provider, int status, Bundle extras) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public IBinder onBind(Intent intent) {
		// TODO Auto-generated method stub
		return null;
	}
	
	/**
	 * Get latitude
	 */
	public double getLatitude(){
		if(location != null){
			latitude = location.getLatitude();
		}
		return latitude;
	}
	/**
	 * Set latitude
	 */
	public void setLatitude(double latitude){
		this.latitude = latitude;
	}
	
	/**
	 * Get longitude
	 */
	public double getLongitude(){
		if(location != null){
			longitude = location.getLongitude();
		}
		return longitude;
	}
	/**
	 * Set longitude
	 */
	public void setLongitude(double longitude){
		this.longitude = longitude;
	}
	
	/**
	 * Function to check if best network provider
	 * @return boolean
	 */
	public boolean canGetLocation(){
		return this.canGetLocation;
	}
	/**
	 * Function to show setting alert dialog
	 */
	public void showSettingsAlert(){
		AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
		
		alertDialog.setTitle("Cài đặt GPS");
		alertDialog.setMessage("GPS chưa được kích hoạt. Bạn có muốn mở trình cài đặt?");
		
		//On pressing Setting button
		alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
			
			public void onClick(DialogInterface dialog, int which) {
				Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
				mContext.startActivity(intent);
			}
		});
		// On pressing cancel button
		alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
			
			public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();
			}
		});
		
		alertDialog.show();
	}
	
	/**
	 * Stop using GPS listener
	 * Calling this function will stop using GPS in your app
	 */
	public void stopUsingGPS(){
		if(locationManager != null){
			locationManager.removeUpdates(GPSTracker.this);
		}
	}

}
